Automatic gate



T. K. LADD AuToMATIo` GATE Feb. 25, 1930.

2 Sheets-Sheet 1 Filed March 11, 1929 Feb. 25, 1930. T. K. LADDV AUTOMATIC @ATE Filed March 11, 1929 z sheets-sheet 2 l1/wanton Patented Feb. z5, 193el f. UNITED STATES PATENTQPFIQE;

THEoDoEE x. LADD, oEooMANoHE, TEXAs,`AssIGNoR oF ONE-HALE To JACK E. ,Y e

- sTEPHENs, on COMANCHE, TEXAS I AUTOMATIC GATE application. mea March 11, 1929;Vl serial No. 346,030.

y This invention `is an automatic gate for highways. The object is to' provide a relatively simple, practical and eflcientgateway and lgate for locating across highways, 'they k5V same being adapted for automatic operation and openingzthrough the'weight of a vehicle such as an automobile. More specifically, the object is to provide a doublegate weighted so as to automatically close when'opened, and'. 10 having runways :pivotally connected therewith in such al manner that the weight' of any automobile when driven upon the runways will serve yto open the gates for the passage of the car.

In the drawings 1 Figure 1r isA a side elevation of the preferred embodiment of my invention;

Figure 2 'is a transverse vertical section' on Y the line 2-2 of Figure 1. Y

In erecting my invention uponv a highway way and mountpivot blocks 3 at either side of the roadway at one side of the pit; Angular gate supporting frames 4 are thenpiv- ,i 25foted1at 5 to the vertical face ofthe blocks 3 '35V of runways 10 are positioned at each side of the gateway, their adjacent endsvbeing loosely connected withthe frames 4 at either side thereof by heavyv pins 11 set rigidlythrough the frames and having their ends play loosely y ,40 in yslots 12y of the plates13 secured to the ends of the runways 10. Y These runwaysare Y extended out in opposite directions in parallel relation at either side of the roadway and their kouter lextremities vare provided with 45 downwardlyy hooked anchor blocks 14 adapted tofreelyrplay in recesses 15 formed -in theY road bed. Guard blocks 16 are rigidly set at l1, I provide a pit2 transversely in the highy AIn a device of theikind described, in com- Weights A7 are hung by:

of the runways 10, below the gates 9, and this subgate is adapted to play vertically "into and Y tus.

f In operation, the weights 7 normally yhold 55 the gates Y9 in closed relation', andthe subp gate k17 raised.. As a car moves` ontoy the run- Y ways 10 at either side yof the gatesthe weight of the car depresses the frames 4, which piv- 'out of the pit 2in the operation of the apparaoting'upon the points 5 swing outwardly and 60` open the gates 9, the outer ends of which pass down into the pit 2, while their inner ends stand in an upright position, thus leaving ia clearpassage-way through between them. At

the same time, the subgate 17 dropsdown- 65 i wardvinto the pit andout of the way.

Vhle I haveherein described a certainl speclfic manner and method of constructing and assemblingthe elements of my invention,

itis vunderstood that I may vary Vfrom the 'I same' in vminor details, not: departing from the spirit of my invention, so asbest to i' construct a practical device for vthe 'purpose intended,as defined inthe appended claim.

Iclaim: Y. \"`75` bination with a roadway'having a transverse pit formed therein, a pairof gates pivotally Y mounted over the pit and adapted to open and close vertically t-hereover by 'passing 80 their outer ends into the pit, and runways at Y either side of the gates and having their ends loosely-connected therewith at points outside` Y the pivotal* points of the gates, and a sub` gatenloosely conneetedvwith the ends/0f a 85 'set ofthe runways at one side of the gatesV and. adapted to pass into andout of the said pit'in the openingand closing of the gates.

In testimony whereof I affix my signa-ture.

THEODORE K. LADD. 90

the outer sides of these ends of the saidvrun'- ways..v A central subgate :17 is suspended 50y loosely by links 18 from the ends of one set 

